Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edc473405593dbc…

MALICIOUS

PDF

79.1 KB Created: 2021-09-16 20:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4df42f22a963946ff97e622ebc64a3a1 SHA-1: f7233faca66c76428d43f440d38da8476f43ab03 SHA-256: 2edc473405593dbc2d65a7fd028fb4e4b25eb3c31ff17a67cb70a657e6a882a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of link farms used to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f30c785ef7---mevisowezoxafeji.pdf In PDF document text
    • http://go-forum.cn/upload/files/35284517698.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/takenewinupetizu.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/bafasubizuwane.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/xazovizirunekukanonul.pdfIn PDF document text
    • http://leguido.net/files/pudaforezekanezorugokamoj.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/j5arl9vtqnng4tppidpaujoi8j/sawipadov.pdfIn PDF document text
    • http://vanhacollection.com/images/files/70439825926.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/98416769004.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/18900143962.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/lupebo.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/lefunewiz.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/88826290535.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/tikolumidutixaxidateb.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/nakafevovugisako.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/ruzaditebolebuvabofoparu.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/gezowepurojozif.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/deduxu.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/55459030632.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/3003827989.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/30518439645.pdfIn PDF document text
    • http://industrialdevices.in/uploads/gitepilukodazi.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109120600569599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cara+pasang+game+android+di+pcPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 10744 bytes
SHA-256: 440f4314832e7521225569f2077fe515c96bb7b5a37a6a569e59a1e63b8672fc
font_01_sfnt_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 16796 bytes
SHA-256: b4b29112a5a5eff64a8901f9206db848520e658820f22c6b824cd74c26823479
font_02_sfnt_off0001170e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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